Findings

What do systematic reviews say?

2 questions · 3 findings · 2 reviews

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No studies found 0 · 0%GRADE not reported 3 · 100%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

Composite resin vs Amalgam restoration

Restoration failure · Permanent posterior teeth (molars/premolars) receiving direct restoration

There was no statistically significant difference in failure risk between composite resin and amalgam restorations in permanent posterior teeth (pooled RR 0.96, 95% CI 0.68 to 1.34; 13 studies; not GRADE-rated, with very high heterogeneity, I2 = 97%).

1 finding from 1 review

Failure Risk of Composite Resin and Amalgam Restorations: A Systematic Review and Meta-Analysis. 2025 All outcomes
At least 12 months follow-up (included studies followed 24 to 144 months) · Permanent posterior teeth; clinical/practice settings across multiple countries (not clearly specified)
RR 0.96 [0.68, 1.34]
13 studies
GRADE not reported

Low polymerization shrinkage resin composite (silorane, ormocer, bulk-fill or other modified-monomer composite) vs Conventional methacrylate-based resin composite

Postoperative sensitivity · People with permanent posterior teeth restored with class I or II direct restorations

Postoperative sensitivity at 12 months did not differ significantly between low polymerization shrinkage and methacrylate composites (OR 1.65, 95% CI 0.71 to 3.81; Moderate certainty).

2 findings from 1 review

Meta-analysis of the clinical behavior of posterior direct resin restorations: Low polymerization shrinkage resin in… 2018 All outcomes
12 months · Posterior class I/II restorations in permanent teeth; multicenter randomized controlled trials conducted across Europe, the Americas, and the Middle East
OR 1.65 [0.71, 3.81]
10 studies · 970 participants
GRADE not reported
Meta-analysis of the clinical behavior of posterior direct resin restorations: Low polymerization shrinkage resin in… 2018 All outcomes
24 months · Posterior class I/II restorations in permanent teeth; multicenter randomized controlled trials conducted across Europe, the Americas, and the Middle East
Six articles (seven experimental groups) evaluated postoperative sensitivity after 24 months; four showed no sensitivity in either group and three favored the control group, but the overall meta-analytic effect was not…
6 studies
GRADE not reported